<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>bs4</title>
</head>
<body>
    <ul>
        <li>张三</li>
        <li>李四</li>
        <li>王五</li>
        <a href="二刺螈" id="0" class="a1"></a>
    </ul>

    <a herf="" title="a2">百度</a>
    <div id="d1">
        <span>
            哈哈哈
        </span>
    </div>
    <p id="p1" class="p1">大傻逼</p>
</body>
</html>